PHYSICS4A_2025_mcortez

How do the predicted velocity and the measured velocity compare in each case?  Did your measurements agree with your initial prediction?  If not, why?  The predicted velocity from the video was mostly lower than the calculated velocity of the cart in all the runs. The percentage difference between the two values ranged from 12.13% to 27.42%. This shows that either the way the video analysis was done could've been not perfectly accurate or the theoretical calculation did not fully account for real-world factors such as friction and air resistance affecting the cart’s motion, timing inaccuracies in the video analysis or assumptions in the theoretical calculations like ignoring rotational inertia of the pulley. Does the launch velocity of the car depend on its mass?  The mass of the block?  The distance the block falls?  Is there a choice of distance and block mass for which the mass of the car does not make much difference to its launch velocity? Increasing t...

  Where do the two curves match?  Where do the two curves start to diverge from one another?  What does this tell you about the system?  The two curves appear to match at lower values of the middle mass (around 0.05 kg to 0.07 kg). They begin to diverge beyond 0.07 kg, around 0.09 kg and 0.11 kg, where the measured vertical displacement starts to deviate more. At lower masses, the system behaves as expected, following the theoretical model. What are the limitations on the accuracy of your measurements and analysis? The assumption of frictionless pulleys may not hold for larger masses and possible stretch in the string or deformation in the setup could introduce systematic errors. What will you report to your supervisor?  How does the vertical displacement of an object suspended on a string between two pulleys depend on the mass of that object? The vertical displacement generally follows the expected trend, but discrepancies emerge for larger middle masses. The r...

 Calculated the initial velocities: average, minimum and maximum with uncertainty and percent uncertainty for the first rocket launch videos.  Calculated the range: average, minimum, and maximum with uncertainty and percent uncertainty for the first rocket launch videos. Used video analysis app to create position v time and velocity v time graphs.  Helped when calculating air drag and spring constant. transported the rocket around and made sure it was brought back safely to class when needed.

Slides

1.  Measurement of Acceleration due to gravity from a motion detector.   What did you measure?  We measured the position and velocity v time graphs from a falling basketball using a motion detector to get an acceleration.  How did you measure? By using the program LoggerPro on the laptops we were able to setup a motion detector that was held by some rods to then detect a basketball that we used to drop right under the motion detector to achieve our results and data. We then fit the graphs with a quadratic curve fit to get our graphs. What were your results? After fitting our graphs with the quadratic curve fit we achieved two accelerations, on for the position v time and one for the velocity v time.  For position v time we got a value of -8.93m/s^2.  For the velocity v time graph we got a value of -9.416m/s^2 What was the standard deviation of your result?    We used other groups results to get a standard deviation of -9.500 +- 0.191m/s^2. 2....